User Language Switch, CVE-2026-0735

CVE, Research URL: CVE-2026-0735
Home page URL: Security reports for User Language Switch
Application: User Language Switch
Published on: Feb 14, 2026
Research Description: The User Language Switch plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'tab_color_picker_language_switch' parameter in all versions up to, and including, 1.6.10 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Affected versions: max 1.6.10.
Status: vulnerable